Except than an accidentally released ROM update for the Vodafone HTC Touch
Diamond2, neither Vodafone nor O2 have yet released Windows Mobile 6.5 upgrades.
However, O2 Germany told us, that the Windows Mobile 6.5 upgrade for the Toshiba
TG01 is soon to be released.

All Windows Mobile 6.5 upgrades are available free of charge. Have you seen
further *official* Windows Mobile 6.5 upgrades? Please let us know!

UPDATE:While O2 Germany's
Toshiba TG01 upgrade
is still not available, Toshiba's recently released Windows Mobile 6.5 upgrade
for the TG01 is available in English, German and French and is for the branded
versions available from Orange UK and Orange France as well as O2 Germany
- however it's not yet
confirmed is this will also work with carrier branded versions as available from
O2 Germany or Orange UK.